Danger From The Deep is a tactical submarine simulation game that puts you in command of German WWII Uboats.
The game has been developed as an Open Source project and is available for free under the GNU GPLv2
license. The artwork is licensed under a Attribution/NonDerivative/NonCommercial Creative Commons license,
CC At/Nd/Nc 2.5.

The game use gl4es and is heavily using shader. The game is pretty slow, even on a gigahertz Pandora, with the exterior view running at 4 fps. But the game is still playable.
You may need a swapfile for this to run (you certainly need a swap on CC model), and I don't expect the game to run on CC because of the shaders.
I only tested with the 4.10 SGX drivers. (beware not to zoomin too much initially on the map view, it may crash).